Baffle for water-tube boilers.



a. KUEHNE.

BAFFLE FOR WATER TUBE BOILERS.

APPLICATION FILED APR. 9. I914. mmmm Patented Apr.13,1915.

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ave/2%") THE NORRIS PETERS C0, PHOTD-LITHQ. WASHING TIYN D G. KUEHNE. BAFFLE FOR WATER TUBE BOILERS. APPLICATION FILED APR. 9, 19M. mmmm, Patented Apr.13,1915.

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l I 1 I I I 1 l I I I THE NORRIS PETERS (30 PHO'm-L- .HQ, WASHINGTON. D C

GEORGE KUEI-INE, OF CHICAGO, ILLINOIS.

BAFFLE FOB VTATEB-TUBE BOILEPfi.

Specification of Letters Patent.

Patented Apr. 13, 1915...

Application filed. April 9, 1914. Serial No. 830,599.

To all whom it may concern: 7

Be it known that T, GEORGE Kunrmn, a citizen of the United States, and a resident of Chicago, county of Cook, and State of Tilinois, have invented certain new and useful Improvements in Baffles for Water-Tube Boilers, of which the following is a full, clear, and exact description.

The invention relates to baffles, such as are commonly employed with water-tube boilers for forming a passage through which the combustion gases pass over the bank of water tubes of the boiler.

The improvement seeks to provide a bafiie of durable construction which is well adapted to resist the heat to which it'is subjected, and the invention consists in the features of improvement hereinafter set forth, illustrated in the preferred form in the accompanying drawings and more particularly pointed out in the appended claims.

Figure 1 is a view in elevation of a water tube boiler, the boiler setting being shown in section. Fig. 2 is a view partly in section and partly in elevation of the improved baffie. Fig. 3 is a cross-section on the line 33 of Fig. 2.

The improved baffle is adapted for use with different types of water tube boilers. That shown comprises a bank of water tubes 10 which extend between the front and rear water legs or headers 11 and 11 of the boiler. These legs depend from a suitable drum 12. The boiler setting comprises the usual side walls 18 and transverse front and back walls 14: and 15. The grate 16 is arranged between the front wall 15 and a lower transverse bridge wall 17 which extends upwardly to the bank of water tubes. The setting is also provided, between the bridge wall 17 and the rear wall 15, with an upper transverse wall 18 which is arranged above the bank of tubes.

The baflie 19 extends across the bank of tubes above the bridge walls 17 and below the transverse wall 18, so that a sinuous passage is provided for the combustion gases. The construction of the improved baffle is shown in Figs. 2 and 3. It comprises a body of cement, reinforced by ropes of asbestos which are wound about the tubes. The bank of tubes 10, as most clearly shown in Fig. 2, of a water tube boiler, are usually arranged the ends of the channels.

in horizontal rows, the tubes of adjacent rows being staggered, as shown. The body of cement forming the baffle is preferably inclosed in a metal frame which surrounds the bank of tubes. Tn the preferred construction shown, this frame comprises uprlght side channel bars 20 which are connected at their upper and lower ends by cross-straps 21. The straps are provided with bent end portions 22 which are riveted to Preferably, also, the flanges of the side channels are provided with projecting portions 23 which extend inwardly between the tubes of the adjacent vertical row. The metal frame incloses a body 24- of suitable fire-proof cement through which the water tubes 10 extend. The cement forming the body of the baffle is reinforced by ropes of asbestos fiber, which are wound about the tubes. The staggered arrangement of the horizontal rows of tubes form diagonal rows and the asbestos rope is preferably wound back and forth, as shown, about these diagonal rows of tubes, portions of the rope crossing each other between the adjacent tubes of each diagonal row. With this arrangement, a single ring of rope surrounds two of the corner tubes, as indicated at their upper left hand and lower right hand corners of the constructions shown in Fig. 2.

n forming the improved baffie, the ropes are first wound about the tubes, the metal frame is placed about the bank of tubes and a body of a suitable, fire-resisting, cement composition is placed about the tubes and within the frame, and within which the ropes are embedded. By winding the ropes in the preferred manner shown, all portions of the cement baffle are reinforced, except that disposed between the tubes at the extreme side edges thereof, and these portions of the cement baffle are reinforced or supported by the inwardly projecting lugs 23 of the channel bars 20. The ropes are preferably of such size that they snugly embrace the tubes through the greater portions of their peripheries and so strengthen the baffle that individual tubes may be removed and replaced when necessary, without material injury to the baffle. The diagonal arrangement of the ropes also aids in forming a strong construction. Inasmuch as the ocment composition and asbestos ropes are unaffected by heat, the construction is eX- tremely durable.

It is obvious that changes may be made in the details set forth without departure from the essentials of the invention as defined in the claims.

p I claim as my invention 1. The combination with the tubes of a Water-tube boiler, of a battle therefor formed of suitable cement reinforced by ropesof fire resisting material Wound about the tubes.

2. The combination with the bank of tubes of a Water-tube boiler, of a battle therefor comprising asbestos rope wound about the tubes and embedded in a body of suitable cement.-

3. The combination with the rows of tubes of a Water-tube boiler, of a bafiie therefor,

comprising a body of cement reinforced by asbestos ropes Wound back and forth over the rows of tubes. 7

.4. The combination with the rows of tubes ofa Water-tube boiler, of a bafiie therefor comprising ropes of fire resistingmaterial Copies ofrthis patent may be obtained for five cents each, by addressing the wound back and forth over the diagonal rows of tubes and embedded in a body of suitable cement.

5. The combination with the bank of tubes of a water tube boiler, of a baflie therefor comprising a metal frame surrounding said bank of tubes, a body of cement within said frame, and asbestos ropes wound back and forth over the diagonal rows of tubes and embedded in said cement body.

6. The combination with the bank of tubes of a water-tube boiler, of a bailie therefor comprising a metal frame surrounding said bank of tubes and formed of side channel bars and cross-straps connecting the ends of said channel bars, the flanges of the latter having projections extending between the adjacent tubes, a body of cement within said frame, and ropes of fire-resisting material wound back and forth about the diagonal rows of tubes.

GEORGE KUEHNE. Witnesses:

J. G. ANDERSON, HARRY L. CLAPP.

Commissioner of Patents,

Washington, D. G. 

